SLAC-PUB-7869Electron-Positron Pair Production in the Deep Quantum Regime

Abstract

Electron-positron pair production via real and virtual photons is
significant to the design of linear colliders, especially in the deep
quantum regime (i.e., beamstrahlung parameter Upsilon >> 1). In this
regime, pair production via a virtual photon (the trident process) can
become comparable in rate to pair production via a real beamstrahlung
photon. We derive characteristics of the
e+e- pairs produced via the trident
process, using the quasi-classical approach of Baier, Katkov, and
Strakhovenko. We have also examined some of the implications
of e+e- pair production for the design of
very high energy (several TeV in the center of mass) linear colliders
in the deep quantum regime.

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